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20127391747 = 235914832271
BaseRepresentation
bin10010101111101011…
…111010000000000011
31220221201020102212121
4102233223322000003
5312210103013442
613125115505111
71311530002261
oct225753720003
956851212777
1020127391747
11859942a361
123a98758197
131b89bbc178
14d8d1a7431
157cc031967
hex4afafa003

20127391747 has 8 divisors (see below), whose sum is σ = 21358471680. Its totient is φ = 18925976520.

The previous prime is 20127391721. The next prime is 20127391751. The reversal of 20127391747 is 74719372102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20127391747 is a prime.

It is a super-2 number, since 2×201273917472 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20127391717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7414779 + ... + 7417492.

It is an arithmetic number, because the mean of its divisors is an integer number (2669808960).

Almost surely, 220127391747 is an apocalyptic number.

20127391747 is a deficient number, since it is larger than the sum of its proper divisors (1231079933).

20127391747 is a wasteful number, since it uses less digits than its factorization.

20127391747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14832353.

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 20127391747 in words is "twenty billion, one hundred twenty-seven million, three hundred ninety-one thousand, seven hundred forty-seven".

Divisors: 1 23 59 1357 14832271 341142233 875103989 20127391747